Steam-generator.



N0.739,445. E PATENTEDSEPTJEE.1903.1

L.' EAUEAUSEE'. STEAM GENERATOR.

APPLIOATION FILED JAN. 27. 1903.

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i PATE-MBD SEPT. 22, 190s. L. RAUHAUSBR. STEAM GENERATOR. APIVLIOATIONFILED JAN. 27. 1903.

No. 739,445.Vl

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Tm: Nonms PETERS co. PnoYuLm-IQ. WASHINGTON, Dnc.

e UNITEDv STAT-Es Patented September 22, 1903.

LOUIs RAUHAUSER, or BROOKLYN, NEW YORK.

STEAM -G EN EfRAToR.

iEECIFICATlON forming part of Letters Patent No. 739,445, datedlSeptember 22, 1903.

Application nea January 27,1963. Serin No. 140,699. or@ man.)

'To all whom it mag/concern:

Be it known that I,.LoU1s RAUHAUSER, a' citizen of the United States,and a resident of Brooklyn, in the county of'Kings and State of NewYork, have invented 'certain new and usefullmprovements inSteam-Generators, of l which the following is a specification.

The invention relates to improvements in steam-generators; and itconsists-in the novel features, arrangement, and combinations of partshereinafter described, and particularly pointed out in the claims.

The obj ect of the invention is to provide a. steam-boiler in which thesteam may be economically generated and which within a limited spacewill afford the maximum extentvof heating-surfaces for the water.

In accordance with my invention I provide a fire-box, acombustion-chamber containing a .set of tubes exposed to the action ofthe heat and through which the waterpasses, a boiler Apropercontainingthe body of water and the set of tubes throughwhich the prodvuct of combustion from said chamber passesl on its way to the `uptake or'stack,`and suitable'water-legs extending from one end -of said boilerto one end of the tubes in the com-l bustion-chamber and from the otherend of said tubes in the combustion-chamber to said boiler, whereby thewater in the boiler ,surrounding the tubes therein is'caused tocirculate on a line downward through one waterleg, thence through thetubes in the combustion-chamber, and thence upward through the otherwater-leg back to the boiler, the water being thus subjected to contactwith the exterior surfaces of the boiler-tubes and the in- Vone of thedoors leading to the hand-hole plates for the combustion-'chamber tubesbeing shown in an open position; and Fig. 3 is a rear end view, partlybroken away, of same.

-of fuel.

" v In the drawings, 10 ydesignates the tire-box;

11,V the general combustin-chamber; 12, the

'tubes disposed within the combustion-cham provided the vertical wall 21which extends upwardly to a point about the middle of the bank of lowertubes 12, so that the products of combustion will be compelled therebyto ascend around andbetween the front portions of the tubes 12, andthence by a rear plate or wall 22 be compelled to descend around andbetween the middle portion of the tubes 12, and

thence ascend around and between the 'rear' portions of the tubes 12tothe upper portion :of the Combustion `chamber 11, where said productsof combustion will enter the boilertubes 14, and after traveling throughsaid `tubes 14 find an escape at the uptake 17. There are a large numberof the tubes 12, as illus'- trated, and with the arrangement and con-.struction shown this bank of tubes 12 is subjectedA throughout itsextent to the action 'of the products of combustion, the latter beingcompelled to take a serpentine course in-repeatedcontact with saidtubes, whereby said tubes, with the water flowing through the` same,become properly heated without waste The rear plate or wall 22 dependsfrom about the rear end of the boiler 13 to a point about the middle ofthe bank of lower tubes 12, as shown.

The boiler 13 is disposed over the fire-box 10 and extends rearwardly ofthe vertical plane of the walll 21, the lower walls of the boiler beingthus exposed to the action of the products of combustion, an d saidboiler at the lower side of its front portion is provided with theopening-23, leading to the front water leg 15,'which is formed betweenthe plates 24 and 25,'as shown in Fig. 1, and communivGates with all ofthe tubes 12, the latter at their front ends being secured withinapertures in the plate 25, while the plate 24, in line with roo thefront ends of said tubes 12, is apertured and provided with hand-holeplates, there being one hand-hole plate for the front end of each tube12, and these hand -hole plates being normally concealed behind thefront doors 26. Upon the opening of the doors 26 the hand-hole plateswill be exposed, as represented in Fig. 2.

The lower ends of the plates 24 25 are bent inwardly toward each otherto form thelower end of the front water-leg, and, as shown in Fig. 1,the said inwardly-bent portions overlap each other and are rivetedtogether. The upper end of the plates 24- 25 are formed with ilangesextending outwardly from each other and conforming to the adjacentsurfaces of the boiler, to which they are riveted. The

upper ends of the plates 24 25 constitute a cradle receiving andsupporting the front end of the boiler, and the lower ends of theseplates are supported by the masonry over the feed-door 19.

The rear water-leg 16 is formed between the broad plates 27 28 and is incommunication with the rear ends of all of the tubes 12, the rear endsof said tubes 12 being secured within apertures in the plate 27, whilein the plate 28 hand-hole plates are provided in line with each of thetubes 12. The plates 27 2S are properly braced and secured by suitablestaybolts 29, and the upper ends of these plates are curved frontwardlyto engage and be secured to the rear end of the boiler 13, an opening 30being provided in the rear end of the boiler for the passage of thewater from the rear leg 16 into said boiler. The lower end of thewater-leg 16 is securely riveted to a mud-drum 81, which is mounted insaddles 32, resting upon ball-bearings 33, supported upon masonry 34.The mud-drum 231 is in communication with the lower end of the water-leg16 and provided with hand-hole plates at its ends for enabling at theproper time the convenient cleaning out of the drum.

The tubes 14 are secured at their rear ends in holes formed in the rearend of the boiler 13 and at their front ends in holes formed in thefront plate 35 of the boiler in a usual manner, and the rear ends of thetubes 14 are in free communication with the upper rear portion of thecoinbustion-chamber 11, while the front ends of said tubes 14 open intothe chamber 36, from which the stack or uptake 17 leads. The rearwater-leg 16 forms the rear wall of the combustion-chamber 11, and theupper forwardlycurved portion of said leg closes the top of the upperrear portion of said chamber and compels the products of combustion toenter the tubes 14, the upper end of said leg being above said tubes.

The chamber 36 is cylindrical in outline, and its horizontal walls areabout in line with the cylindrical walls of the boiler, and the frontend of this chamber is provided with a door, as shown, in line with thebank of boilertubes 14. The chamber 36 projects forwardly of the boiler,and its cylindrical shell is at 4uptake 17.

its inner end riveted to the shellof the boiler, as shown in Fig. 1. Theuptake or stack 17 is secured to the top of the shell forming `thechamber The tubes 14 are secured to the front and rear plates or headsol' the boiler and extend at right angles thereto, and the tubes 12 aresecured at their ends in apertures formed in the inner plates of thefront and rear water- ]egs and extend at right angles to said plates,this arrangement of the tubes 'l2 being deemed very important in thesuccessful construction and operation of the generator.

rlhe operation of the generator will probably be fully understood fromthe description hereinbefore presented. The fire will be started uponthe gratebars 1S, and the products of combustion will ascend around andabout the front portions of the tubes 12 and under the boiler 13, andthence along the lower sides of the boiler and down around and betweenthe middle portions of the tubes 12, and thence up, around, and betweenthe rear portions of the tubes 12 t0 the rear end of the boiler, wherethe hot products will pass through the boiler-tubes 14 and enter thechamber 36, whence they will escape through the stack or The upper endof the rear waterleg 16 is on a gradual curve above the lower tubes 14and compels the hot products to as evenly as possible pass through allthe tubes 14, the-space between the rear end ofthe boiler and the upperpart of the water-leg 16 gradually lessening as the upper end of saidleg approaches the end of the boiler. The gradual inward curvature ofthe upper portion of the rear water-leg 16 also facilitates thecirculation of the water, which in the construction described movesupwardly through the said leg 16. The water will be supplied to theboiler in the usual manner and will pass around and between the tubes 14therein, and thence circulate downward into the front waterleg 15 and'into and through the tubes 12 to the rear water-leg 16, up through whichthe water will pass to the boiler 13, there thus being a circulation ofthe water and an eX- posure of the water to the heating action of thetubes 12 and 14. With the construction presented maximumheating-surfaces for the water are provided, and the latter is enabledto absorb the maximum amount of heat produced at the fire box 10. Myinvention, therefore, produces means for generating steam in aneconomical manner and with the maximum efficiency and within a limitedamount of space, one purpose of the invention being to securetheincreased heating-surfaces without the employment of an undue amount ofspace.

IFC

What I claim as my invention, and desire with said -combustion-chamberand at the otherI end with the uptake, the front waterleg 15 comprisingthe parallel plates and communicating with and extendingdownwardly belowon'e end of said boiler, the rear waterleg 16 formed of the plates 27,28, constitut- 'ing the rear wall of the co1nbustion-chamber and attheir upper portions turning forwardly to engage and communicate withsaid boiler above the tubes 14 therein, and the bank of tubes 12vextending lengthwiseof said oombustion-chamber and at their front endscomrear ends with the rear water-leg 16, said' municatin g with theWater-leg 15 and at their tubes 12 being arranged at right angles to thefacing plates of said water legs, and said rear water -leg being closedexcept Where it communicates with said tubes 12 and withl said boilerabove the tubes 14 therein, substantially as set forth.

2. The steam-generator comprising the rebox and combustion-chamber,combined withvother end with the uptake, the front waterleg 15comprising` the parallel plates and communicating with and extendingdownwardly below one end of said boiler, the rear waterleg 16 formed ofthe plates 27, 28, constituting the rear wall of the combustion-chamberchamber and at their front ends communicati ing with the water-leg 15and at their rear ends with the rear water-leg 16, the rear wall 21 ofthe fire-box extended upwardly to a point about the middle of said bankof tubes 12, and the depending rear wall 22 extending downwardly toabout the middle of said bank of tubes 12, said tubes 12 being arrangedat right angles to the facing-plates of said waterlegs, and said rearwater-leg being closed except where it communicates with said tubes 12and with said boiler above the tubes14 therein, substantially as setforth.

Signed at New York, in the county of New York and State of New York,this 26th day of January, A. D. 1903.

` LOUIS RAUHAUSER.

Witnesses:

ARTHUR MARION, CHAs. C. GILL.

